Consolidating Guarantor Financial Information (Schedule of Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 728	$ 490
Investing Activities
Capital expenditures on property, plant and equipment	(165)	(116)
Acquisitions, net of cash acquired	(144)	(268)
Proceeds from sale of businesses and assets, net	9	1
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	(31)	(6)
Net cash provided by (used in) investing activities	(331)	(389)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	40	202
Proceeds from short-term borrowings	36	104
Repayments of short-term borrowings	(39)	(55)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(43)	(58)
Purchases of treasury stock, including related fees	(100)	(300)
Dividends to parent	0	0
Contributions from parent	0
Proceeds from Stock Options Exercised	0	1
Series A common stock dividends	(136)	(116)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	(8)	(8)
Other, net	(6)	(19)
Net cash provided by (used in) financing activities	(256)	(249)
Exchange rate effects on cash and cash equivalents	(9)	21
Net increase (decrease) in cash and cash equivalents	132	(127)
Cash and cash equivalents as of beginning of period	576	638
Cash and cash equivalents as of end of period	708	511
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	238	415
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	(100)	(300)
Dividends to parent	0	0
Contributions from parent	0
Proceeds from Stock Options Exercised		1
Series A common stock dividends	(136)	(116)
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	(236)	(415)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	2	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	2	0
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	432	342
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	(11)
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)	(272)	(74)
Other, net	0	0
Net cash provided by (used in) investing activities	(272)	(85)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	90	161
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	(12)	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(238)	(415)
Contributions from parent	0
Proceeds from Stock Options Exercised		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	0
Net cash provided by (used in) financing activities	(160)	(254)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	3
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	0	3
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	115	351
Investing Activities
Capital expenditures on property, plant and equipment	(109)	(82)
Acquisitions, net of cash acquired	(144)	(12)
Proceeds from sale of businesses and assets, net	0	0
Return of capital from subsidiary	218	9
Contributions to subsidiary	(16)	0
Intercompany loan receipts (disbursements)	(10)	(11)
Other, net	(7)	(1)
Net cash provided by (used in) investing activities	(68)	(97)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	11	2
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	272	74
Repayments of long-term debt	(13)	(1)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(449)	(306)
Contributions from parent	0
Proceeds from Stock Options Exercised		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	(5)	(17)
Net cash provided by (used in) financing activities	(184)	(248)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	(137)	6
Cash and cash equivalents as of beginning of period	230	51
Cash and cash equivalents as of end of period	93	57
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	630	283
Investing Activities
Capital expenditures on property, plant and equipment	(56)	(34)
Acquisitions, net of cash acquired	0	(264)
Proceeds from sale of businesses and assets, net	9	20
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	(24)	(5)
Net cash provided by (used in) investing activities	(71)	(283)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(51)	50
Proceeds from short-term borrowings	36	104
Repayments of short-term borrowings	(39)	(55)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(18)	(57)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	0	(180)
Contributions from parent	16
Proceeds from Stock Options Exercised		0
Series A common stock dividends	0	0
Return of capital to parent	(218)	(9)
(Distributions to) contributions from noncontrolling interests	(8)	(8)
Other, net	(1)	(2)
Net cash provided by (used in) financing activities	(283)	(157)
Exchange rate effects on cash and cash equivalents	(9)	21
Net increase (decrease) in cash and cash equivalents	267	(136)
Cash and cash equivalents as of beginning of period	346	587
Cash and cash equivalents as of end of period	613	451
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(687)	(901)
Investing Activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	19
Proceeds from sale of businesses and assets, net	0	(19)
Return of capital from subsidiary	(218)	(9)
Contributions to subsidiary	16	0
Intercompany loan receipts (disbursements)	282	85
Other, net	0	0
Net cash provided by (used in) investing activities	80	76
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(10)	(11)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	(272)	(74)
Repayments of long-term debt	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	687	901
Contributions from parent	(16)
Proceeds from Stock Options Exercised		0
Series A common stock dividends	0	0
Return of capital to parent	218	9
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	607	825
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