Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Divestiture Information [Line Items]
Net sales		$ 5,126	$ 5,503	$ 14,767	$ 16,490
Earnings before income taxes		744	796	1,855	3,165
Proceeds from divestiture of business				0	1,399
Total after-tax separation costs		$ 37		$ 115
Total after-tax separation costs per share		$ 0.06		$ 0.18
Income tax expense related to planned strategic repositioning actions		$ 13		$ 41
Pretax separation costs		28	0	83	0
After-tax separation costs		24		74
Gain on divestiture of business		$ 0	$ 0	0	932
Gain on divestiture of business, after tax				0	528
Scenario, Forecast [Member] | Minimum [Member]
Divestiture Information [Line Items]
Total after-tax separation costs						$ 200
Total after-tax separation costs per share						$ 0.30
Scenario, Forecast [Member] | Maximum [Member]
Divestiture Information [Line Items]
Total after-tax separation costs						$ 250
Total after-tax separation costs per share						$ 0.38
Power Transmission Solutions [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Divestiture Information [Line Items]
Proceeds from divestiture of business					1,400
Gain on divestiture of business					932
Gain on divestiture of business, after tax					$ 528
Gain on divestiture impact on diluted earnings per share					$ 0.77
Network Power [Member]
Divestiture Information [Line Items]
Estimated cash to be received upon separation of business				4,000
Net sales							$ 4,400
Earnings before income taxes							255
Power Generation, Motors and Drives Businesses [Member]
Divestiture Information [Line Items]
Net sales							1,700
Estimated value to be received upon separation of businesses				1,200
Earnings before income taxes							$ 105
Power Generation, Motors and Drives Businesses [Member] | Scenario, Forecast [Member]
Divestiture Information [Line Items]
Discontinued operation, gain (loss) on disposal, after-tax	$ (100)
Impact to diluted earnings per share of disposal gain (loss) on discontinued operations	$ (0.15)
Combined, Network Power and Power Generation, Motors and Drives Businesses [Member]
Divestiture Information [Line Items]
Potential U.S. tax costs due to repatriation of cash related to separation of businesses				$ 200
Potential U.S. tax cost due to repatriation of cash related to separation of businesses, per share				$ 0.30
Potential repatriation of cash related to separation of businesses				$ 1,500
Combined, Network Power and Power Generation, Motors and Drives Businesses [Member] | Minimum [Member]
Divestiture Information [Line Items]
Estimated pretax gain (loss) to be recognized upon separation of businesses				450
Estimated after-tax gain (loss) to be recognized upon separation of businesses				$ (50)
Estimated after-tax gain (loss) to be recognized upon separation of businesses, per share				$ (0.08)
Combined, Network Power and Power Generation, Motors and Drives Businesses [Member] | Maximum [Member]
Divestiture Information [Line Items]
Estimated pretax gain (loss) to be recognized upon separation of businesses				$ 550
Estimated after-tax gain (loss) to be recognized upon separation of businesses				$ (150)
Estimated after-tax gain (loss) to be recognized upon separation of businesses, per share				$ (0.23)