Consolidating Guarantor Financial Information (Schedule of Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 490	$ 636
Investing Activities
Capital expenditures on property, plant and equipment	(116)	(128)
Acquisitions, net of cash acquired	(268)	0
Proceeds from sale of businesses and assets, net	1	2
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	(6)	(12)
Net cash provided by (used in) investing activities	(389)	(138)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	202	(353)
Proceeds from short-term borrowings	104	22
Repayments of short-term borrowings	(55)	(63)
Proceeds from long-term debt	0	170
Repayments of long-term debt	(58)	(183)
Purchases of treasury stock, including related fees	(300)	(200)
Dividends to parent	0	0
Contributions from parent	0	0
Stock option exercises	1	3
Series A common stock dividends	(116)	(98)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	(8)	(6)
Other, net	(19)	(24)
Net cash provided by (used in) financing activities	(249)	(732)
Exchange rate effects on cash and cash equivalents	21	2
Net increase (decrease) in cash and cash equivalents	(127)	(232)
Cash and cash equivalents as of beginning of period	638	967
Cash and cash equivalents as of end of period	511	735
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	415	297
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	(300)	(200)
Dividends to parent	0	0
Contributions from parent	0	0
Stock option exercises	1	3
Series A common stock dividends	(116)	(98)
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	(415)	(295)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	2
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	0	2
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	342	294
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	136
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	(74)	138
Other, net	0	0
Net cash provided by (used in) investing activities	(85)	274
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	161	(345)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	250
Repayments of long-term debt	0	(175)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(415)	(296)
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	(2)
Net cash provided by (used in) financing activities	(254)	(568)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	3	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	3	0
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	351	152
Investing Activities
Capital expenditures on property, plant and equipment	(82)	(66)
Acquisitions, net of cash acquired	(12)	0
Proceeds from sale of businesses and assets, net	0	1
Return of capital from subsidiary	9	741
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	(11)	(5)
Other, net	(1)	(9)
Net cash provided by (used in) investing activities	(97)	662
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	2	(3)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	74	325
Repayments of long-term debt	(1)	(634)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(306)	(260)
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	(248)	(592)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	6	222
Cash and cash equivalents as of beginning of period	51	21
Cash and cash equivalents as of end of period	57	243
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	283	449
Investing Activities
Capital expenditures on property, plant and equipment	(34)	(62)
Acquisitions, net of cash acquired	(264)	0
Proceeds from sale of businesses and assets, net	20	1
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	90
Other, net	(5)	(3)
Net cash provided by (used in) investing activities	(283)	26
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	50	0
Proceeds from short-term borrowings	104	22
Repayments of short-term borrowings	(55)	(63)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(57)	(7)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(180)	0
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	(9)	(877)
(Distributions to) contributions from noncontrolling interests	(8)	(6)
Other, net	(2)	(2)
Net cash provided by (used in) financing activities	(157)	(933)
Exchange rate effects on cash and cash equivalents	21	2
Net increase (decrease) in cash and cash equivalents	(136)	(456)
Cash and cash equivalents as of beginning of period	587	946
Cash and cash equivalents as of end of period	451	490
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(901)	(556)
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	(9)	(877)
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	85	(223)
Other, net	0	0
Net cash provided by (used in) investing activities	76	(1,100)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(11)	(5)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	(74)	(405)
Repayments of long-term debt	0	633
Purchases of treasury stock, including related fees	0	0
Dividends to parent	901	556
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	9	877
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	825	1,656
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