CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 281	$ 258	$ 313	$ 328	$ 309	$ 283	$ 284	$ 223	$ 1,180	$ 1,099	$ 1,116
Other comprehensive income (loss), net of tax:
Defined benefit retirement plans gain (loss), net of tax expense (benefit) of $41, $(4), and $(64)									110	(13)	(119)
Foreign currency translation adjustments, net of tax expense (benefit) of $-, $- and $-									1
Other comprehensive income (loss)									111	(13)	(119)
Comprehensive income									$ 1,291	$ 1,086	$ 997