Other Comprehensive Earnings 2 (Details) (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
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
INCOME BEFORE INCOME TAX EXPENSE									$ 224	$ 1,250	$ 948
Income tax expense									(463)	(473)	(375)
Other income									59	35	3
NET (LOSS) INCOME	239	(1,045)	269	298	233	270	74	200	(239)	777	573
Amount Reclassified out of Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net actuarial loss									(88)
Prior service cost									(5)
INCOME BEFORE INCOME TAX EXPENSE									(93)
Income tax expense									35
Other income									(1)
NET (LOSS) INCOME									$ (59)