Stockholders' Equity (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Stockholders' Equity Disclosure [Abstract]
Dividends per common share (in dollars per share)		$ 0.12	$ 0.12
Dividends recorded on common stock		$ 70,000,000	$ 75,000,000
Dividends recorded on unvested restricted share units		1,000,000
Dividends paid	69,000,000	75,000,000	81,000,000
Dividend declared, date paid		Apr. 01, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)		(543,000,000)	(566,000,000)	(545,000,000)	(569,000,000)
Other comprehensive income (loss) before reclassifications		(5,000,000)	(8,000,000)
Reclassifications to net earnings		7,000,000	11,000,000
Net other comprehensive income (loss)		2,000,000	3,000,000
Tax provision on net actuarial gain (loss) and prior service costs related to pension and other postretirement benefit plans		4,000,000	7,000,000
Share Repurchase Program [Line Items]
Value of shares repurchased		2,000,000,000
Remaining authorization under share repurchase program		3,430,000,000
Open Market Repurchase [Member]
Share Repurchase Program [Line Items]
Class B Common Stock repurchased under repurchase program (shares)		7.9
Value of shares repurchased		500,000,000
Accelerated Share Repurchase [Member]
Share Repurchase Program [Line Items]
Class B Common Stock repurchased under repurchase program (shares)		18.6
Value of shares repurchased		1,500,000,000
ASR settlement (shares)	4.9
Cumulative Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)		182,000,000		187,000,000
Other comprehensive income (loss) before reclassifications		(5,000,000)
Reclassifications to net earnings		0
Net other comprehensive income (loss)		(5,000,000)
Net Actuarial Gain (Loss) and Prior Service Cost [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)		(728,000,000)		(735,000,000)
Other comprehensive income (loss) before reclassifications		0
Reclassifications to net earnings		7,000,000
Net other comprehensive income (loss)		7,000,000
Unrealized Gain (Loss) on Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)		3,000,000		3,000,000
Other comprehensive income (loss) before reclassifications		0
Reclassifications to net earnings		0
Net other comprehensive income (loss)		0
Continuing Operations [Member] | Cumulative Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)			196,000,000		192,000,000
Other comprehensive income (loss) before reclassifications			4,000,000
Reclassifications to net earnings			0
Net other comprehensive income (loss)			4,000,000
Continuing Operations [Member] | Net Actuarial Gain (Loss) and Prior Service Cost [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)			(937,000,000)		(948,000,000)
Other comprehensive income (loss) before reclassifications			0
Reclassifications to net earnings			11,000,000
Net other comprehensive income (loss)			11,000,000
Continuing Operations [Member] | Unrealized Gain (Loss) on Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)			3,000,000		2,000,000
Other comprehensive income (loss) before reclassifications			1,000,000
Reclassifications to net earnings			0
Net other comprehensive income (loss)			1,000,000
Discontinued Operations [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)			172,000,000		185,000,000
Other comprehensive income (loss) before reclassifications			(13,000,000)
Reclassifications to net earnings			0
Net other comprehensive income (loss)			$ (13,000,000)