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Equity and Noncontrolling Interests - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Jun. 30, 2019

Dec. 31, 2018

Jun. 30, 2018

Jun. 30, 2019

Jun. 30, 2018

Mar. 31, 2019

Sep. 30, 2018

Mar. 31, 2018

Sep. 30, 2017

Accumulated Other Comprehensive Income (Loss) [Line Items]

AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax

$ 1

$ 4

$ 1

$ 4

$ 2

$ 1

Foreign currency translation adjustments

Balance at beginning of period

(952)

(255)

Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent

(90)

(557)

Balance at end of period

(563)

(812)

(563)

(812)

Realized and unrealized gains (losses) on derivatives

Current period changes in fair value

(9)

1

10

(10)

Realized and unrealized gains (losses) on marketable securities

Balance at beginning of period

0

2

Current period changes in fair value

0

1

Balance at end of period

0

2

0

2

Reclassification to income

0

(1)

0

(1)

Reclassification to income, tax effect

(1)

0

(1)

Pension and postretirement plans

Balance at beginning of period

(2)

(2)

Other changes

0

0

Balance at end of period

(2)

(2)

(2)

(2)

Accumulated other comprehensive loss

(564)

(808)

(564)

(808)

$ (946)

Proceeds from Sale and Maturity of Marketable Securities

3

Marketable Securities, Realized Gain (Loss)

2

Foreign currency translation adjustments

Foreign currency translation adjustments

Balance at beginning of period

$ (939)

(939)

(481)

Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent

(103)

(331)

Balance at end of period

(563)

(812)

(563)

(812)

Aggregate adjustment for period, tax effect

0

^[1]

0

^[1]

0

1

Realized and unrealized gains (losses) on derivatives

Realized and unrealized gains (losses) on derivatives

Current period changes in fair value

(4)

5

4

7

Reclassification to income

(1)

(2)

6

(9)

Current period changes in fair value, tax effect

(3)

1

1

2

Reclassifcation to income, tax effect

0

^[2]

(2)

^[2]

3

^[1]

(4)

^[1]

Realized and unrealized gains (losses) on marketable securities

Realized and unrealized gains (losses) on marketable securities

Balance at beginning of period

8

8

4

Current period changes in fair value

0

(1)

Balance at end of period

0

2

0

2

Current period changes in fair value, tax effect

0

0

Pension and postretirement plans

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax

0

0

Pension and postretirement plans

Balance at beginning of period

(2)

(2)

(2)

Balance at end of period

(2)

(2)

(2)

(2)

Scott Safety business [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax

12

Accounting Standards Update 2016-01 [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Cumulative Effect on Retained Earnings, Net of Tax

0

Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] | Realized and unrealized gains (losses) on derivatives

Accumulated Other Comprehensive Income (Loss) [Line Items]

AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax

1

4

1

4

$ (13)

$ 6

Retained Earnings | Accounting Standards Update 2016-01 [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Cumulative Effect on Retained Earnings, Net of Tax

$ 8

8

AOCI Attributable to Parent [Member] | Accounting Standards Update 2016-01 [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Cumulative Effect on Retained Earnings, Net of Tax

(8)

0

Power Solutions

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax

479

0

Realized and unrealized gains (losses) on derivatives

Reclassification to income

(4)

0

Power Solutions | Foreign currency translation adjustments

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax

479

0

Power Solutions | Realized and unrealized gains (losses) on derivatives

Realized and unrealized gains (losses) on derivatives

Current period changes in fair value

4

0

Current period changes in fair value, tax effect

$ 1

$ 0

$ 1

$ 0

[1]

* During the nine months ended June 30, 2018, $12 million of cumulative CTA was recognized as part of the divestiture-related gain recognized as part of the divestiture of Scott Safety.

[2]

** Refer to Note 15, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items in the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives. *** As previously disclosed, during the quarter ended December 31, 2018, the Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." As a result the Company reclassified $8 million of unrealized gains on marketable securities to retained earnings as of October 1, 2018. **** During the nine months ended June 30, 2018, the Company sold certain marketable common stock for approximately $3 million. As a result, the Company recorded $2 million of realized gains within selling, general and administrative expenses.

X

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Accumulated unrealized gain (loss), after tax, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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