Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Basis Of Presentation And Summary Of Significant Accounting Policies Details [Abstract]
Depreciation expense									$ 369	$ 374	$ 371
Amortization expense related to capital leases									19	19	18
Accumulated amortization of capital leases	131				132				131	132
Advertising Expense									419	399	432
Provision for doubtful accounts charged to expense									17	24	37
Net Earnings (Loss) per Common Share [Abstract]
Weighted average shares for basic EPS	634	640	646	650	653	659	669	674	642	664	679
Dilutive effect of shares issuable under stock-based compensation plans									17	17	15
Weighted average shares for diluted EPS	650	656	661	667	669	675	686	693	659	681	694
Stock Based Compensation Table Detail [Abstract]
RSUs and PSUs									111	99	103
Stock options and equivalents									42	40	33
Stock-based compensation expense, before income taxes									153	139	136
Related tax benefit									(59)	(54)	(54)
Stock-based compensation expense, net of tax benefit									94	85	82
Number of shares held by certain wholly owned subsidiaries	179								179
Shares held by wholly owned subsidiaries that were repurchased	47								47
Shares held by wholly owned subsidiaries that were issued by the Company	132								132
Comprehensive Income (Loss) [Abstract]
Tax (provision) benefit on net actuarial gain (loss) and prior service costs related to pension and other postretirement plans									80	77	39
Tax (provision) benefit on unrealized gain (loss) on securities									0.3	0.1	(0.3)
Cumulative translation adjustments									7	12	4
Net actuarial gain (loss) and prior service cost									(138)	(145)	102
Unrealized gain (loss) on securities									0	0	2
Total other comprehensive income (loss), net of tax									(130)	(153)	110
Accumulated Other Comprehensive Income Loss Net Of Tax Abstract
Accumulated Other Comprehensive Income (Loss), Net of Tax	(569)				(439)				(569)	(439)	(286)	(396)
Continuing operations [Member]
Comprehensive Income (Loss) [Abstract]
Total other comprehensive income (loss), net of tax									(131)	(133)	108
Accumulated Other Comprehensive Income Loss Net Of Tax Abstract
Cumulative Translation Adjustments, Accumulated Other Comprehensive Income	115				108				115	108	96	92
Net Actuarial Gain (Loss) and Prior Service Cost, Accumulated Other Comprehensive Income	(948)				(810)				(948)	(810)	(665)	(767)
Unrealized Gain (Loss) on Securities, Accumulated Other Comprehensive Income	2				2				2	2	2	0
Discontinued Operations [Member]
Comprehensive Income (Loss) [Abstract]
Tax on other comprehensive income (loss)									1.0	1.0	0.4
Total other comprehensive income (loss), net of tax									1	(20)	2
Accumulated Other Comprehensive Income Loss Net Of Tax Abstract
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 262				$ 261				$ 262	$ 261	$ 281	$ 279
Maximum [Member]
Maximum Minimum [Line Items]
Finite-lived intangible asset useful life									40 years
Minimum [Member]
Maximum Minimum [Line Items]
Finite-lived intangible asset useful life									4 years
Building [Member] | Maximum [Member]
Maximum Minimum [Line Items]
Property plant and equipment useful life									40 years
Building [Member] | Minimum [Member]
Maximum Minimum [Line Items]
Property plant and equipment useful life									20 years
Leasehold Improvements [Member]
Maximum Minimum [Line Items]
Property and equipment estimated useful lives									Shorter of lease term or useful life
Advertising Structures [Member] | Maximum [Member]
Maximum Minimum [Line Items]
Property plant and equipment useful life									20 years
Advertising Structures [Member] | Minimum [Member]
Maximum Minimum [Line Items]
Property plant and equipment useful life									5 years
Equipment and other (including capital leases) [Member] | Maximum [Member]
Maximum Minimum [Line Items]
Property plant and equipment useful life									20 years
Equipment and other (including capital leases) [Member] | Minimum [Member]
Maximum Minimum [Line Items]
Property plant and equipment useful life									3 years
Employee Stock Option [Member]
Anti Dilutive Securities [Line Items]
Antidilutive securities excluded from computation of earnings per share									4	21	31