Consolidating Guarantor Financial Information (Schedule of Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 143	$ 192
Investing Activities
Capital expenditures on property, plant and equipment	(86)	(62)
Acquisitions, net of cash acquired	(144)	0
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	(14)	(3)
Net cash provided by (used in) investing activities	(235)	(64)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	101	6
Proceeds from short-term borrowings	36	7
Repayments of short-term borrowings	(38)	(29)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(31)	(53)
Purchases of treasury stock, including related fees	0	(128)
Dividends to parent	0	0
Contributions from parent	0	0
Series A common stock dividends	(63)	(51)
Return of capital to parent	0	0
(Distributions to) contributions from noncontrolling interests	(2)	(4)
Other, net	(5)	(18)
Net cash provided by (used in) financing activities	(2)	(270)
Exchange rate effects on cash and cash equivalents	8	5
Net increase (decrease) in cash and cash equivalents	(86)	(137)
Cash and cash equivalents as of beginning of period	576	638
Cash and cash equivalents as of end of period	490	501
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	63	179
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	0	(128)
Dividends to parent	0	0
Contributions from parent	0	0
Series A common stock dividends	(63)	(51)
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	(63)	(179)
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	277	196
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)	(222)	0
Other, net	0	0
Net cash provided by (used in) investing activities	(222)	(11)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	15	(7)
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	(6)	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(62)	(178)
Contributions from parent	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	0
Net cash provided by (used in) financing activities	(53)	(185)
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
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(33)	210
Investing Activities
Capital expenditures on property, plant and equipment	(54)	(42)
Acquisitions, net of cash acquired	(144)	0
Proceeds from sale of businesses and assets, net	0	0
Return of capital from subsidiary	211	5
Contributions to subsidiary	(16)	0
Intercompany loan receipts (disbursements)	(15)	7
Other, net	(3)	0
Net cash provided by (used in) investing activities	(21)	(30)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	2	6
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	222	0
Repayments of long-term debt	(12)	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(272)	(165)
Contributions from parent	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	(5)	(16)
Net cash provided by (used in) financing activities	(65)	(175)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	(119)	5
Cash and cash equivalents as of beginning of period	230	51
Cash and cash equivalents as of end of period	111	56
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	170	130
Investing Activities
Capital expenditures on property, plant and equipment	(32)	(20)
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net	9	12
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	(11)	(3)
Net cash provided by (used in) investing activities	(34)	(11)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	99	0
Proceeds from short-term borrowings	36	7
Repayments of short-term borrowings	(38)	(29)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(13)	(53)
Purchases of treasury stock, including related fees	0	0
Dividends to parent	0	(180)
Contributions from parent	16	0
Series A common stock dividends	0	0
Return of capital to parent	(211)	(5)
(Distributions to) contributions from noncontrolling interests	(2)	(4)
Other, net	0	(2)
Net cash provided by (used in) financing activities	(113)	(266)
Exchange rate effects on cash and cash equivalents	8	5
Net increase (decrease) in cash and cash equivalents	31	(142)
Cash and cash equivalents as of beginning of period	346	587
Cash and cash equivalents as of end of period	377	445
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(334)	(523)
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	(11)
Return of capital from subsidiary	(211)	(5)
Contributions to subsidiary	16	0
Intercompany loan receipts (disbursements)	237	(7)
Other, net	0	0
Net cash provided by (used in) investing activities	42	(12)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(15)	7
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	(222)	0
Repayments of long-term debt	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	334	523
Contributions from parent	(16)	0
Series A common stock dividends	0	0
Return of capital to parent	211	5
(Distributions to) contributions from noncontrolling interests	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	292	535
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