Indebtedness (Debt Issuances During Current Period) (Details) - US Dollar Notes [Member]	Jun. 30, 2019 USD ($)
2.875% US Dollar Notes Due May 2024 [Member]
Debt Instrument [Line Items]
Face Value	$ 900,000,000
Interest Rate	2.875%
3.375% US Dollar Notes Due August 2029 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	3.375%

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant