Financing arrangements

The carrying values and fixed contractual coupon rates of our borrowings were as follows (in millions):



	June 30, 2017			December 31, 2016
Commercial paper	$	960		$	—
Short-term loan	—			605
2.125% notes due 2017 (2.125% 2017 Notes)	—			1,250
Floating Rate Notes due 2017	—			600
1.25% notes due 2017 (1.25% 2017 Notes)	—			850
5.85% notes due 2017 (5.85% 2017 Notes)	—			1,100
6.15% notes due 2018 (6.15% 2018 Notes)	500			500
4.375% €550 million notes due 2018 (4.375% 2018 euro Notes)	620			577
5.70% notes due 2019 (5.70% 2019 Notes)	1,000			1,000
1.90% notes due 2019 (1.90% 2019 Notes)	700			—
Floating Rate Notes due 2019	550			250
2.20% notes due 2019 (2.20% 2019 Notes)	1,400			1,400
2.125% €675 million notes due 2019 (2.125% 2019 euro Notes)	771			710
4.50% notes due 2020 (4.50% 2020 Notes)	300			300
2.125% notes due 2020 (2.125% 2020 Notes)	750			750
Floating Rate Notes due 2020	300			—
2.20% notes due 2020 (2.20% 2020 Notes)	700			—
3.45% notes due 2020 (3.45% 2020 Notes)	900			900
4.10% notes due 2021 (4.10% 2021 Notes)	1,000			1,000
1.85% notes due 2021 (1.85% 2021 Notes)	750			750
3.875% notes due 2021 (3.875% 2021 Notes)	1,750			1,750
1.25% €1,250 million notes due 2022 (1.25% 2022 euro Notes)	1,429			1,315
2.70% notes due 2022 (2.70% 2022 Notes)	500			500
2.65% notes due 2022 (2.65% 2022 Notes)	1,500			—
3.625% notes due 2022 (3.625% 2022 Notes)	750			750
0.41% CHF700 million bonds due 2023 (0.41% 2023 Swiss franc Bonds)	731			687
2.25% notes due 2023 (2.25% 2023 Notes)	750			750
3.625% notes due 2024 (3.625% 2024 Notes)	1,400			1,400
3.125% notes due 2025 (3.125% 2025 Notes)	1,000			1,000
2.00% €750 million notes due 2026 (2.00% 2026 euro Notes)	857			789
2.60% notes due 2026 (2.60% 2026 notes)	1,250			1,250
5.50% £475 million notes due 2026 (5.50% 2026 pound sterling Notes)	619			586
4.00% £700 million notes due 2029 (4.00% 2029 pound sterling Notes)	912			864
6.375% notes due 2037 (6.375% 2037 Notes)	552			552
6.90% notes due 2038 (6.90% 2038 Notes)	291			291
6.40% notes due 2039 (6.40% 2039 Notes)	466			466
5.75% notes due 2040 (5.75% 2040 Notes)	412			412
4.95% notes due 2041 (4.95% 2041 Notes)	600			600
5.15% notes due 2041 (5.15% 2041 Notes)	974			974
5.65% notes due 2042 (5.65% 2042 Notes)	487			487
5.375% notes due 2043 (5.375% 2043 Notes)	261			261
4.40% notes due 2045 (4.40% 2045 Notes)	2,250			2,250
4.563% notes due 2048 (4.563% 2048 Notes)	1,415			1,415
4.663% notes due 2051 (4.663% 2051 Notes)	3,541			3,541
Other notes due 2097	100			100
Unamortized bond discounts, premiums and issuance costs, net	(936		)	(936		)
Total carrying value of debt	$	35,062		$	34,596
Less current portion	(1,459		)	(4,403		)
Total noncurrent debt	$	33,603		$	30,193

There are no material differences between the effective interest rates and coupon rates of any of our borrowings, except for the 4.563% 2048 Notes and the 4.663% 2051 Notes, which have effective interest rates of approximately 6.3% and 5.6%, respectively.

Debt repayments

During the six months ended June 30, 2017, we repaid the $605 million short-term loan, the $1.25 billion aggregate principal amount of the 2.125% 2017 Notes, the $600 million aggregate principal amount of the Floating Rate Notes due 2017, the $850 million aggregate principal amount of the 1.25% 2017 Notes and the $1.1 billion aggregate principal of the 5.85% 2017 Notes.

Debt issuances

In May 2017, we issued a $3.5 billion principal amount of notes, consisting of the Floating Rate Notes due 2019, the 1.90% 2019 Notes, the Floating Rate Notes due 2020, the 2.20% 2020 Notes and the 2.65% 2022 Notes. In the event of a change-of-control triggering event, as defined in the terms of the notes, we may be required to purchase all or a portion of these debt securities at a price equal to 101% of the principal amount of the notes plus accrued and unpaid interest. All of the aforementioned fixed-rate notes may be redeemed at any time, in whole or in part, at the principal amount of the notes being redeemed plus accrued and unpaid interest and, except for the 2.65% 2022 Notes, a make-whole amount, which is defined by the terms of the notes. The 2.65% 2022 Notes may be redeemed without payment of the make-whole amount if redemption occurs on or after one month prior to maturity.

During the three months ended June 30, 2017, we issued commercial paper under our commercial paper program. As of June 30, 2017, the weighted-average effective borrowing rate on outstanding commercial paper was 1.3%.