Segment, Geographical Area, Major Customer and Major Supplier Information (Geographical Information - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 2,621	$ 2,313	$ 2,361	$ 2,296	$ 2,402	$ 2,354	$ 2,482	$ 2,634	$ 9,591	$ 9,872	$ 11,147
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									3,336	3,334	3,507
Asia and Other Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,771	1,879	2,139
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,448	1,482	1,750
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									106	121	144
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									2,428	2,506	2,976
Other Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 502	$ 550	$ 631