Stockholders' Equity 1 (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015
Cash dividends
Declaration date	Aug. 03, 2016	May 04, 2016	Aug. 06, 2015	May 05, 2015
Dividend per share (in dollars per share)	$ 0.255	$ 0.255	$ 0.25	$ 0.25
Record date	Aug. 25, 2016	May 26, 2016	Aug. 27, 2015	May 28, 2015
Total amount	$ 107	$ 107	$ 110	$ 110
Payment date	Sep. 13, 2016	Jun. 14, 2016	Sep. 15, 2015	Jun. 16, 2015

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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