Shareholders' Equity and Noncontrolling Interests, Dividends (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Shareholders' Equity and Noncontrolling Interests
Dividends declared	$ 74.0	$ 69.3	$ 210.8	$ 195.6
Dividends paid (including those declared in the prior year)	$ 68.3	$ 69.0	$ 205.5	$ 184.4

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration