-Statement [Line Items] {ID126}
Beginning Balance {ID127}
Beginning Balance, Shares {ID128}
Common stock dividends, $0.80 per share {ID129}
Restricted stock and stock options expense {ID130}
Restricted stock activity and related tax expense of $3 {ID131}
Restricted stock activity and related tax expense of $3, shares {ID132}
Exercise of stock options and related tax benefit of $6 {ID133}
Exercise of stock options and related tax benefit of $6, shares {ID134}
Purchase of BNSF common stock {ID135}
Purchase of BNSF common stock, shares {ID136}
-Comprehensive income: {ID137}
Change in unrecognized prior service credit and actuarial losses, net of tax expense of $4 {ID139}
Fuel/interest hedge mark-to-market and other items, net of tax expense of $147 {ID140}
Recognized loss on derivative instruments-discontinued hedges, net of tax benefit of $16 {ID141}
Total comprehensive income {ID142}
Ending Balance, Shares {ID144}