Stockholders' Equity (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended			3 Months Ended				3 Months Ended		3 Months Ended		3 Months Ended			3 Months Ended
	Apr. 30, 2013	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Continuing Operations [Member]	Mar. 31, 2012 Continuing Operations [Member]	Mar. 31, 2013 Continuing Operations [Member] Cumulative Translation Adjustments [Member]	Dec. 31, 2012 Continuing Operations [Member] Cumulative Translation Adjustments [Member]	Mar. 31, 2013 Continuing Operations [Member] Net Actuarial Gain (Loss) and Prior Service Cost [Member]	Dec. 31, 2012 Continuing Operations [Member] Net Actuarial Gain (Loss) and Prior Service Cost [Member]	Mar. 31, 2013 Continuing Operations [Member] Unrealized Gain (Loss) on Securities [Member]	Dec. 31, 2012 Continuing Operations [Member] Unrealized Gain (Loss) on Securities [Member]	Mar. 31, 2013 Discontinued Operations [Member]	Mar. 31, 2012 Discontinued Operations [Member]	Dec. 31, 2012 Discontinued Operations [Member]	Mar. 31, 2013 Open Market Repurchase [Member]	Jun. 30, 2013 Accelerated Share Repurchase [Member]	Mar. 31, 2013 Accelerated Share Repurchase [Member]
Stockholders' Equity Details [Abstract]
Dividends per common share (in dollars per share)		$ 0.12	$ 0.10
Dividends recorded on common stock		$ 75,000,000	$ 66,000,000
Dividends recorded on unvested restricted share units		1,000,000
Dividends paid	74,000,000	81,000,000	69,000,000
Dividend declared, date paid		Apr. 01, 2013
Treasury Stock [Line Items]
Stock repurchase program authorized amount																		1,000,000,000
Class B Common Stock repurchased under repurchase program (shares)																6.2		17.9
Value of shares repurchased																262,000,000
Average price per share repurchased (in dollars per share)																$ 42.68
Remaining authorization under share repurchase program																1,250,000,000
ASR settlement																	4.3
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss		(566,000,000)		(569,000,000)			123,000,000	115,000,000	(937,000,000)	(948,000,000)	3,000,000	2,000,000	245,000,000		262,000,000
Other comprehensive income (loss) before reclassifications		(8,000,000)					8,000,000		0		1,000,000		(17,000,000)
Reclassification from accumulated other comprehensive income (loss) to net earnings		11,000,000					0		11,000,000		0		0
Net other comprehensive income (loss)		3,000,000					8,000,000		11,000,000		1,000,000		(17,000,000)
Other comprehensive income (loss), net of tax		3,000,000	19,000,000		20,000,000	14,000,000							(17,000,000)	5,000,000
Tax provision on net actuarial gain (loss) and prior service costs related to pension and other postretirement benefit plans		$ 7,000,000