Consolidating Guarantor Financial Information (Schedule of Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 745	$ 940
Investing Activities
Capital expenditures on property, plant and equipment	(180)	(186)
Acquisitions, net of cash acquired	(269)	0
Proceeds from sale of businesses and assets, net	1	8
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	(9)	(14)
Net cash provided by (used in) investing activities	(457)	(192)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	224	(347)
Proceeds from short-term borrowings	150	39
Repayments of short-term borrowings	(91)	(76)
Proceeds from long-term debt	0	1,509
Repayments of long-term debt	(65)	(1,095)
Purchases of treasury stock, including related fees	(500)	(300)
Dividends to parent	0	0
Contributions from parent	0	0
Stock option exercises	1	3
Series A common stock dividends	(178)	(150)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	(18)	(15)
Other, net	(19)	(35)
Net cash provided by (used in) financing activities	(496)	(467)
Exchange rate effects on cash and cash equivalents	31	4
Net increase (decrease) in cash and cash equivalents	(177)	285
Cash and cash equivalents as of beginning of period	638	967
Cash and cash equivalents as of end of period	461	1,252
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	677	447
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net	0	0
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	0	0
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	0	0
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	0
Repayments of long-term debt	0	0
Purchases of treasury stock, including related fees	(500)	(300)
Dividends to parent	0	0
Contributions from parent	0	0
Stock option exercises	1	3
Series A common stock dividends	(178)	(150)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	(677)	(447)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	0	0
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	623	437
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	(11)	0
Proceeds from sale of businesses and assets, net	0	0
Return of capital from subsidiary	0	145
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	(174)	(283)
Other, net	0	0
Net cash provided by (used in) investing activities	(185)	(138)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	245	(344)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	1,589
Repayments of long-term debt	0	(1,082)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(678)	(447)
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	(13)
Net cash provided by (used in) financing activities	(433)	(297)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	5	2
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	5	2
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	571	299
Investing Activities
Capital expenditures on property, plant and equipment	(122)	(100)
Acquisitions, net of cash acquired	(12)	0
Proceeds from sale of businesses and assets, net	0	1
Return of capital from subsidiary	18	750
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	(25)	(9)
Other, net	(1)	(9)
Net cash provided by (used in) investing activities	(142)	633
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	5	6
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	174	746
Repayments of long-term debt	(1)	(635)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(571)	(398)
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	(17)	(20)
Net cash provided by (used in) financing activities	(410)	(301)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	19	631
Cash and cash equivalents as of beginning of period	51	21
Cash and cash equivalents as of end of period	70	652
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	403	602
Investing Activities
Capital expenditures on property, plant and equipment	(58)	(86)
Acquisitions, net of cash acquired	(265)	0
Proceeds from sale of businesses and assets, net	20	7
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	90
Other, net	(8)	(5)
Net cash provided by (used in) investing activities	(311)	6
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(1)	0
Proceeds from short-term borrowings	150	39
Repayments of short-term borrowings	(91)	(76)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(64)	(11)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(280)	0
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	(18)	(895)
(Distributions to) contributions from noncontrolling interests	(18)	(15)
Other, net	(2)	(2)
Net cash provided by (used in) financing activities	(324)	(960)
Exchange rate effects on cash and cash equivalents	31	4
Net increase (decrease) in cash and cash equivalents	(201)	(348)
Cash and cash equivalents as of beginning of period	587	946
Cash and cash equivalents as of end of period	386	598
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,529)	(845)
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	19	0
Proceeds from sale of businesses and assets, net	(19)	0
Return of capital from subsidiary	(18)	(895)
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	199	202
Other, net	0	0
Net cash provided by (used in) investing activities	181	(693)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(25)	(9)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	(174)	(826)
Repayments of long-term debt	0	633
Purchases of treasury stock, including related fees	0	0
Dividends to parent	1,529	845
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	18	895
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	1,348	1,538
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	$ 0	$ 0