Consolidated and Combined Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Benefit plan adjustments, income tax expenses (benefit)	$ 11	$ (1)	$ 19	$ (3)
Share of other comprehensive income from equity affiliates, income tax expense (benefit)	$ (2)	$ 0	$ 2	$ 0